From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3F5BEC43215 for ; Fri, 15 Nov 2019 18:44:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 159CE20815 for ; Fri, 15 Nov 2019 18:44:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="mr86IiEk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727208AbfKOSn6 (ORCPT ); Fri, 15 Nov 2019 13:43:58 -0500 Received: from mail-wm1-f66.google.com ([209.85.128.66]:37419 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726992AbfKOSn4 (ORCPT ); Fri, 15 Nov 2019 13:43:56 -0500 Received: by mail-wm1-f66.google.com with SMTP id b17so11485399wmj.2; Fri, 15 Nov 2019 10:43:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=MFlnOn0CAyQafh0Ou2lpY54Ga03K/6YVfFICBBVyXck=; b=mr86IiEkh6BMzmVhCk3kgov07rgov4gwotKNoFw+me9PSEVD86+veJHoXHDyaY8vle BaSP7G7ZjnZP0j9WMGLdxvykaNUocXqaCCXUSci7TRPOeFbN8HUtxpvVemnzyHPURVFT gghQLhflIrHtxfkRBv2xTBRdBYxUN7U8WGNiK6rRri+yCgTJU3ISFKtJa9W7ukJA9Yj/ NFbLkEWxlIfTTkh732tcDcrFebUHb9sA17rVudEFd5Y+3KdkQXfGusVgx/WMjI/EETGt l5dg4b5SzcCPARD4+RHCKSuSBBE0zDEfaEn44ojlOhuEb/QFhRiIF4moOzz5ibPCQKGs u31g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=MFlnOn0CAyQafh0Ou2lpY54Ga03K/6YVfFICBBVyXck=; b=bwpSiAKyUPlcYZ/AkMUqS0u70pBsPHVvmnmLCDBj/oX212ZCbSQe51ngNnFr344/om T5OS4fIYLnHD4Ym8uD/nJHeX43j11QL7Z3XbRWRDTKxa6e1mtQrDzaFVznoHEo1zcBfc /kIGWVoii+SftHJDH19UqkEGLfxhwoAmF+djpNORF6H0AMjIL8ZMkoRvP6/AyBgJQz7z ODm7zANhuB3hGCGiT3wUgr5KCzhdKN9IQJJsTPXMBiLY4+TNwQWnV49r90Zy6oMmcOey DfSQ9gOk3/zAMjDqPZGetSk/F+yALSFUaNJIQn6vkz39Bk9Dnlbpz9cbeV8bm31uxp3u BfFw== X-Gm-Message-State: APjAAAV4LjLIL0UAL/NjhrE+p+hCy+ROgx2GySSdQyLyhqgC8dG1kgHf SPo9osg57z1/pFW3Y2v9z4ExpQG8nxg= X-Google-Smtp-Source: APXvYqw3Oh5ANrOKWgIZchBUqjbmhrA+8Tx4boW7ZEkB/jUJhDm2lKldwdzgc97981Uz5S5BPS488g== X-Received: by 2002:a1c:dd06:: with SMTP id u6mr17059416wmg.109.1573843433848; Fri, 15 Nov 2019 10:43:53 -0800 (PST) Received: from stbsrv-and-01.and.broadcom.net ([192.19.231.250]) by smtp.gmail.com with ESMTPSA id g138sm2620989wmg.11.2019.11.15.10.43.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Nov 2019 10:43:53 -0800 (PST) From: Al Cooper To: linux-kernel@vger.kernel.org Cc: Al Cooper , bcm-kernel-feedback-list@broadcom.com, devicetree@vger.kernel.org, Florian Fainelli , Kishon Vijay Abraham I , linux-arm-kernel@lists.infradead.org, Mark Rutland , Rob Herring , Srinath Mannam Subject: [PATCH v2 11/13] phy: usb: bdc: Fix occasional failure with BDC on 7211 Date: Fri, 15 Nov 2019 13:42:21 -0500 Message-Id: <20191115184223.41504-12-alcooperx@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191115184223.41504-1-alcooperx@gmail.com> References: <20191115184223.41504-1-alcooperx@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The BDC "Read Transaction Size" needs to be changed from 1024 bytes to 256 bytes to prevent occasional transaction failures. Signed-off-by: Al Cooper --- .../phy/broadcom/phy-brcm-usb-init-synopsis.c | 18 +++++++++++++++ drivers/phy/broadcom/phy-brcm-usb-init.h | 1 + drivers/phy/broadcom/phy-brcm-usb.c | 23 +++++++++++++++---- 3 files changed, 38 insertions(+), 4 deletions(-) diff --git a/drivers/phy/broadcom/phy-brcm-usb-init-synopsis.c b/drivers/phy/broadcom/phy-brcm-usb-init-synopsis.c index fe3f653c64a7..c6504649d307 100644 --- a/drivers/phy/broadcom/phy-brcm-usb-init-synopsis.c +++ b/drivers/phy/broadcom/phy-brcm-usb-init-synopsis.c @@ -70,6 +70,11 @@ #define USB_GMDIOCSR 0 #define USB_GMDIOGEN 4 +/* Register definitions for the BDC EC block in 7211b0 */ +#define BDC_EC_AXIRDA 0x0c +#define BDC_EC_AXIRDA_RTS_MASK 0xf0000000 +#define BDC_EC_AXIRDA_RTS_SHIFT 28 + static void usb_mdio_write_7211b0(struct brcm_usb_init_params *params, uint8_t addr, uint16_t data) @@ -198,6 +203,7 @@ static void usb_init_common_7211b0(struct brcm_usb_init_params *params) { void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; void __iomem *usb_phy = params->regs[BRCM_REGS_USB_PHY]; + void __iomem *bdc_ec = params->regs[BRCM_REGS_BDC_EC]; int timeout_ms = PHY_LOCK_TIMEOUT_MS; u32 reg; @@ -230,6 +236,18 @@ static void usb_init_common_7211b0(struct brcm_usb_init_params *params) usb_init_common(params); + /* + * The BDC controller will get occasional failures with + * the default "Read Transaction Size" of 6 (1024 bytes). + * Set it to 4 (256 bytes). + */ + if ((params->mode != USB_CTLR_MODE_HOST) && bdc_ec) { + reg = brcm_usb_readl(bdc_ec + BDC_EC_AXIRDA); + reg &= ~BDC_EC_AXIRDA_RTS_MASK; + reg |= (0x4 << BDC_EC_AXIRDA_RTS_SHIFT); + brcm_usb_writel(reg, bdc_ec + BDC_EC_AXIRDA); + } + /* * Disable FSM, otherwise the PHY will auto suspend when no * device is connected and will be reset on resume. diff --git a/drivers/phy/broadcom/phy-brcm-usb-init.h b/drivers/phy/broadcom/phy-brcm-usb-init.h index 66363b04d778..570bd9d8c9ec 100644 --- a/drivers/phy/broadcom/phy-brcm-usb-init.h +++ b/drivers/phy/broadcom/phy-brcm-usb-init.h @@ -19,6 +19,7 @@ enum brcmusb_reg_sel { BRCM_REGS_XHCI_GBL, BRCM_REGS_USB_PHY, BRCM_REGS_USB_MDIO, + BRCM_REGS_BDC_EC, BRCM_REGS_MAX }; diff --git a/drivers/phy/broadcom/phy-brcm-usb.c b/drivers/phy/broadcom/phy-brcm-usb.c index c82d7ec15334..cc5763ace3ad 100644 --- a/drivers/phy/broadcom/phy-brcm-usb.c +++ b/drivers/phy/broadcom/phy-brcm-usb.c @@ -36,6 +36,7 @@ struct value_to_name_map { struct match_chip_info { void *init_func; u8 required_regs[BRCM_REGS_MAX + 1]; + u8 optional_reg; }; static struct value_to_name_map brcm_dr_mode_to_name[] = { @@ -71,7 +72,7 @@ struct brcm_usb_phy_data { }; static s8 *node_reg_names[BRCM_REGS_MAX] = { - "crtl", "xhci_ec", "xhci_gbl", "usb_phy", "usb_mdio" + "crtl", "xhci_ec", "xhci_gbl", "usb_phy", "usb_mdio", "bdc_ec" }; static irqreturn_t brcm_usb_phy_wake_isr(int irq, void *dev_id) @@ -271,6 +272,7 @@ static struct match_chip_info chip_info_7211b0 = { BRCM_REGS_USB_MDIO, -1, }, + .optional_reg = BRCM_REGS_BDC_EC, }; static struct match_chip_info chip_info_7445 = { @@ -300,7 +302,8 @@ static const struct of_device_id brcm_usb_dt_ids[] = { static int brcm_usb_get_regs(struct platform_device *pdev, enum brcmusb_reg_sel regs, - struct brcm_usb_init_params *ini) + struct brcm_usb_init_params *ini, + bool optional) { struct resource *res; @@ -317,7 +320,13 @@ static int brcm_usb_get_regs(struct platform_device *pdev, return 0; } if (res == NULL) { - dev_err(&pdev->dev, "can't get %s base address\n", + if (optional) { + dev_dbg(&pdev->dev, + "Optional reg %s not found\n", + node_reg_names[regs]); + return 0; + } + dev_err(&pdev->dev, "can't get %s base addr\n", node_reg_names[regs]); return 1; } @@ -460,7 +469,13 @@ static int brcm_usb_phy_probe(struct platform_device *pdev) break; err = brcm_usb_get_regs(pdev, info->required_regs[x], - &priv->ini); + &priv->ini, false); + if (err) + return -EINVAL; + } + if (info->optional_reg) { + err = brcm_usb_get_regs(pdev, info->optional_reg, + &priv->ini, true); if (err) return -EINVAL; } -- 2.17.1